XSS in Reading Progressbar

CVE-2026-2687

The Reading progressbar WordPress plugin before 1.3.1 does not sanitise and escape some of its settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup).

Vulnerability class: XSS (Cross-Site Scripting)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.002 (13.6th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 13.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-2687: held from 0.001 to 0.002.

EPSS over last 30 days · oldest: 0.001 · newest: 0.002 · change: +0.001

Affected products

  • Reading Progressbar — versions 0

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-2687?
CVE-2026-2687 is a medium-severity vulnerability in Reading Progressbar, classified under Cross-site Scripting. CVSS score: 4.3/10. Published 2026-03-12.
How severe is CVE-2026-2687?
Medium severity. CVSS v3 base score is 4.3 out of 10.